[pjot]

Rather than juggling your parent’s __init__ on another thread, it’s usually clearer to:

1. Keep all of your object–initialization in the main thread (i.e. call super().__init__() synchronously).

2. Defer any ZMQ socket creation that you actually use in the background thread into the thread itself.

[ledauphin]

yeah, this just feels like one of those things that's begging for a lazy (on first use) initialization. if you can't share or transfer the socket between threads in the first place, then your code will definitionally not be planning to use the object in the main thread.